Apparatus and method for determining the position of a tool in a borehole
CA 1287169 C · Owner: Peters, Rex B. · Inventors: Peters, Rex B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A system and method for precisely and continuously estimating the path length between the entrance of a borehole and a probe (10) which is supported by an elastic cable (14) and carries a gyrocluster (42) and accelerometer cluster (40). The precise estimate of borehole path length is used to aid the inerital navigation performed within the survey system and Is selectively determined by integration of either the rate at which the probe (10) moves alongthe borehole or a compensated cable feed rate that is based on the rate at whichthe cable (14) passes Into or out of the borehole with correction being made forchanges in temperature and gravity induced cable …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.